Cost Book – Remove Mandatory check from Pending Estimate Value

When manually adding a new Cost Book line item via the Add Cost Book Line pop-up on the Cost Book module, the Pending Estimate field was previously a required field. This mandatory check has now been removed to streamline the data entry process and reduce unnecessary user input.

If the Pending Estimate field is left blank, the system will automatically treat it as 0, consistent with the behaviour of the Pending Budget field. 

This change is only relevant to Cost Book users.